SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd86460c9150c0a2e4ce69363ebd1802455e9f214e24a0d8ef16933baddb147f2' 
  AND token = 'TrNmFvIWuKHowl9JN6yoC6rMpIDSqwG7PUwCmvPnz7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}